Four-wheel maintenance is mainly aimed at the axle head of the vehicle. Contents include: 1, cleaning. When the shaft head bearing runs normally, there will be dust, water and other sundries infiltrating and need to be cleaned; 2. adjust. After a period of use, the four-wheel bearing of the vehicle will be worn and the whole clearance will change. It is necessary to adjust the tightness to prevent the tire from running off. Step 3 lubricate. Bearings need butter lubrication. In use, due to the influence of temperature, dust and moisture, the performance of grease will decline, and it cannot play a lubricating role, so it needs to be lubricated regularly. 4. replace. Any component will wear out, and bearings are no exception. After reaching the service life, it needs to be replaced.
In the following cases, the vehicle needs to do four-wheel alignment. 1, replace a new tire or maintain it after a collision. 2. Unilateral eccentric wear of front and rear tires. 3. The steering wheel is too heavy or floats and shakes when driving. 4. When going straight, the car deviates to the left or right. 5. Daily maintenance of vehicles. After the new car is driven for 3 months, make a four-wheel alignment every six months or 1 10,000 kilometers.